Universal hammer-drill.



E. C. TEUYTER. UNIVE'RSALYHAMMERI DRI'LL- AFFLICATIQN FILED SEPT-13.1916.

Patented Nov. 5,1918..

3 SHEETS-SHEET 1.

E C. TRUYTER. UNIVERSAL HAMMER DRILL.

APPLICATION ;F|LED SEPT- 13, l9l6. 1 ,283,601 a Patented Nov. 5,1918.

3 SHEETS-SHEET 2.

E.- G. TRUYTER. UNIVERSAL HAMMER DRIL L, APPLl-CATlON men 'SEPT- 13. 1916.-

ma ma UNITED STATES PATENT OFFICE.

EDWARD C. TBUYTER, 0F YORK, N. Y.

UNIVERSAL HAMMER-DRILL.

To all whom it may concern:

' Be it known that I, EDWARD CHARLES TRUY'IER, a citizen of the United State's, and resident of the borough of Richmond, county of Richmond, city and State of New York,

have invented certain new and useful Im-,

provements in Universal Hammer-Drills, of which the 'followin is a specification.

This invention re ates to that type of hand operated drill some times termed 'breast v drills and. has for its object the production o'f'--a device that will not only impart to a drill a rotary movement, but will also under predetermined conditions, impart a series of hammer blows to the outer end of a drill while slowly rotating the drill.

The action when the hammer mechanism is used is adapted for the purpose of drilliiig through cement, 'brick wall, tiling, etc., where star drills are usually used an'd it expedites this Work by increasing the number of blows which may be administered to a drilling within a given time and by assuring a rotary motion-during the entire operation which will clear the drill allowing it to be used much more rapidly than under ordinary conditions."

The following is what I consider a good means of carrying out this invention and the accompanying drawings should be considered to fully appreciate the specification which follows In the drawings:

Figure 1 is a perspective view of a completely assembled drillL, v Fig. 2 -is a sectional view through the spring cylinder and the hammer and sprmg adjusting means are shown in el'evat1on.

Fig. 3, is an enlarged plan view of the eccentric gear.

Fig, s an enlarged plan view of the 1nternal gear. I

Fig. 5 a sectional view of a spring operatiiig pin. v

"Fig. 6 an elevation of the member shown in Fig, 5. 1 I

Fig. 7 is a bottom perspective v ew partly in section and thetool holding means and parts adjacent thereto.

Fig. 9flis' a reverse plan view of a part removed.

Fig.10 is a plan view-ofa part adapted to' cooperate with the r fF g? 9;.

Specification of Letters Patent.

formed integral with or secured to a frame.

The frame is provided with two parallel parts 2 and 3, and between them the rotating shaft and gears are supported. High up in- Patented Nov. 5, 19118 Application filed September 13, 1916. Serial lid-119,843.

the frame 2 and 3, I arrange a cross-bar and at the lower end I provide an enlarge portion '5, for reasons that shall lat-er appear. v

Extending between the cross bar 4, and the enlarged portion 5, is a hollow shaft6, upon the outer end of which is rotatably mounted a beveled gear 7, in mesh with the large driving gear 8, and at the lower end of the bar 6, a second beveled gear 9, is arranged also in mesh with the gear 8.

The gear 8, is rotated by means of a shaft 10, and a handle bar 11, andhandle 12, all of ordinary construction, and the functions of which will be thoroughly understood without further description.

Formed integral with the gear 9, is a toothed member 13, and this member rotates with the gear 9. At the opposite side of the gear a further projection 1s arranged and tending through a slot 16. ln theashaft 6,

1s a pin 17, which is secured "in the hamir er 15, and which enters the teeth of the mem- I ber 13.

It will be noted that the teeth of the memher 13,are each provided .with an inclined 1 face and when the gear 9, is rotated the teeth.

of the member 13, will force the pin 17, and hammer -15, outward against the pressure of a spring" 18, and the in 17, passing the apex into the next recess between succeeding teeth,

with the result that the hammer 15, will be ejected forcibly outward.

At the opposite end of the spring 18, I have arranged a disk19, secured to an adjusting'screw 20. The screw 20, is adjust ofopposite teeth wi l he forcibly depressed relieve the hammer entirelyfrom operation during a rotation of the gear 9, I may secure the spring to the hammer, and the other end of the springto the disk 19, then whenthe screw 20, is withdrawn the hammer 15, will also be withdrawn and the pin be caused to pass out of the slots of the toothed member 13.

The eccentric ltope'rzites in a gear QZ,

;. which gear is secured to a disk :.3, having a slot 2%, a' rotation'of the eccentric l-t by ineans ofthe' beveled gear 9,'wi1l impart. an eccentric movement to the gear provided that a spring pin 25. is entered into the slot 24, of the dish 23 This eccentric movement of the gear 22 will cause this gear to interinittentlymove theinternal toothed gear 26, and it will be noted that the gear 26. is permanently secured ,to a cupped member 27',which carries the tool holder 28.

I I In the gear provide a perforation or recess 29 into which a second spring. pin 30. may be insertedand when this second pin enters the recess '29, and the first spring pin 25, is withdrawn the internal gear 27, and eccentric geai 22 will operate in unison. with the eccentric ltfimparting to the tool holder 28, a synchronous motion with the gear 9. i

The spring pin is supported by a hig 31. formed integral with the lower end 5, of the frame and the spring'pin 30, is supported upon a cupped shaped portion of the tool holder, Each of these pins are ofgeneral similar construction.each provided with a casing througlrwhicli apin 33, ex-. tends. This bintermmates in an enlarged.

pin 34. and between shoulders 35, formed in the casing 32. of the enlarged end 3t of the movable pin. a spring 36. arranged, which s )ring will urge the enlarged pin 3t, outward. I

In the casing 32. I provide recesses 37. and upon the head 38. of the-pin 33, I provide projections which may enter the recesses 31'. and allow the enlarged portion St, to be projectedto a desirable extent.

It will be noted that I have provided a shield 40. and ring 41. covering the toothed member 13, and pin 17. This shield may be a perforated brass cup and I may provide a mo 'able ring l2, to secure the beveled gear 7. in position. 7

From the foregoing description, it is believed that the operation of this de ice will be fully understood, I will however, briefly detail it referringto the reference characters that indicate the separate parts.

When my device is to be used as an ordinary drill, that is when it is to turn a twist drill. to drill holes in relatively soft materiahthe tension of the spring 1S. is released; The spring pin 25, is withdrawn from the slot :24: and the spring pin 30 inserted ,into: the recess 29. l

The spring pin30, locks the tool holder 28, and cupsecured. thereto, to'thc gear 22. whereupon a rotation of the gear 8, by means of the handle 12, will rotate the gear 9 the eccentric shaft and eccentric and gear '22. and the tool holder 2 and cup 27. The speed of revolution of a drill held in the tool holder 28, will be determined bythe'rate' of movement of the handle 12.

When' a hammer drill is to be used, the

twist drill is removed from the tool holder 28. andstar drill or other similar or suitable tool is inserted. The pin 30, is withdrawn from the recess 29, the pin 25, is inserted into the slot 2%. and thescrew 20.is moved inward to a desirable extent to cause the pin 17, to rest in thetceth ofthe'imember 13, and the spring 18, to be compressed upon the hammer 15. v I

When at this time the handle 12, is turned the gear 8. will turn the beveled gear 9. and will cause the teeth of .the member 13. to force the pin 17. outward against the spring pressure andwhen this pin passes the-top of the tooth by which it has been lifted it will snap into the next succeeding recess and will again ride upward or outward upon-thebeveled face of the next successive tooth.

I produce an even number of teeth in the member 13, and pass the pin 1?. quite through the hammer 15. this will cause an even lift upon both sides of the hammer and will add materially to the strength of the, device.

l/Vhen the hammer is in use the eccentric it, will rotate freely in the-gear but the gear 22. and disk 23, will be prevented from rotating by the pin 25, in the slot 24. The eccentric will impart an eccentric or slida-ble partially revoluble movementof the gear 22, causing it" to intermittently advance .the internal gear :26, with the result that at each blow .of the hamn'zer the star idrill or tool held .inthe tool holder 28, will-be partially revolved and constructedin the ratio shoavn in the drawings the star drill will turn one complete revolution for 16 blows of the hammer.

The ratio of the gears maybe changed and the star drillturned more or less rapidly as desired. The strength of the spring-18, may be increased or decreased and the size of-all of the parts may be changed at will.

I may use a chisel or any other hammer tool as a substitute for the star drill. If a chisel or hammer tool that should not be turned is to be used in my device, itis only iecessary to withdraw both of the spring pins 25 and 30. This will release the gears and Will allow the eccentric .to move in the eccentric gear 22, Without effecting the rotation of the internal gear 26.

Other modifications may be made Within the scope of the appended claims Without departing from the principle or sacrificing the advantages of the invention.

Having carefully and fully described my invention what I' claim and desire by Letters Patent is:

1. A drill having a rotating driving gear, an eccentric operated thereby, and internal and external toothed gears, operated by said eccentric, a slotted plate secured to one said gear, and a pin entering said slotto prevent a rotation of said gear, to impart an intermittent revoluble motion to a (hill.

2. A device of the character described comprising a toothed member, a gear arranged thereon, an eccentric connected .to said gear, a hammer having a pin entering the teeth of said toothed member, resilient means for depressing saidhammerand said pin, means for rotating said gear for lifting said hammer against the pressure of said to secure resilient member, and a tool holder and means operated by said eccentric for intermittently rotating said tool holder, said means comprising an externally toothed gear, and a slotted plate secured thereto, and operated by said eccentric, and an internally toothed gear in mesh with said externally toothed gear, and secured to said tool holder.

3. A device of the character described having a driving gear, a driven gear having an eccentric rotated thereby, a gear su'r-' rounding said eccentric, and an internal gear, surrounding said last-mentioned gear, a tool holder, and a pin non-rotatably connecting said gear around the eccentric for obtaining an intermittent movement of said tool holder by said first mentioned gear.

4. A device of the character described I comprising a driving gear 8, and a driven gear 26', having a tool holder 28 secured thereto, an eccentric 14 and ears 9 and 22 between sa1d drlven gear an sa1d driving secured'to said internal gear,

.and a gear and c gear for revolving said tool holder, means for securing said tool holder to said driven gear, a slotted plate secured to said driven gear 22, and a spring operated pin entering said slot for preventing a synchronous revolution of said tool holder and said driving gear;

o. A device of the character described comprising a driving gear and means for .ro-

tating it, a hollow shaft arranged adjacent to said driving gear and provided with slots, a movable hammer within said hollow shaft and having pins projecting through the slots in said shaft, and a gear rotatable upon saidshaft, and having a plurality of projections adapted to'engage said projecting pin to elevate said hammer, and means for depressing rotated by said driving gear, and a plurality of projections upon said second gear for elevating said movable member.

7.- A device of the character described comprising agear and means for rotating it, a tubular member adjacent to said driving gear, a member within said tubular member movable longitudinally therein, a second gear upon said tubular member, and rotated by said driving gear, a plurality of projections rotated by said second gear, and

adapted to move said movable member, an

eccentric rotated by the said second gear, lisk upon said eccentric, means for preventing the rotation of said gear, and an internal gear and a tool holder intermittently rotated by the gear upon said eccentric.

Signed at New York city, this 18th day of August, 1916.

EDWARD C. TRUYTER. 

